As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GOT LT PACK LIGHT ON DURING RECALL. LIGHT WENT OFF AFTER MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED ZPT CONTROLLER BITE TEST FAULTED THIS PACK TCV, V139. R & R TEMPERATURE CONTROL VALVE, V139. PERFORMED LEAKAGE AND OPS CHECKS GOOD IAW AMM 21-61-21. ZPT CONTROLLER BITE TEST VERIFIED SHOWS NO FAULTS REF TASK 21-61-00-700-806-002.